Updated README for Magento <2.4.5 instructions

README.md

@@ -174,6 +174,15 @@ bin/download 2.4.6 community
 # bin/cli git checkout 2.4-develop
 # bin/composer install
 
+# Want to install Magento <2.4.5? In bin/setup-install, replace the lines:
+#  --elasticsearch-host="$ES_HOST" \
+#  --elasticsearch-port="$ES_PORT" \
+#  --opensearch-host="$OPENSEARCH_HOST" \
+#  --opensearch-port="$OPENSEARCH_PORT" \
+# with:
+#  --elasticsearch-host="$OPENSEARCH_HOST" \
+#  --elasticsearch-port="$OPENSEARCH_PORT" \
+
 # Run the setup installer for Magento:
 bin/setup magento.test